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Semantic-Preserving Mesh Direct Drilling [PDF]
2010 Shape Modeling International Conference, 2010 Advances in modeling of discrete models have allowed the development of approaches for direct mesh modeling and modification. These tools mainly focus on modeling the visual appearance of the shape which is a key criterion for animation or surgical simulation.
Ruding Lou +6 more
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Hole completion technology for high level directional long borehole in complex roof
Meikuang Anquan, 2023 Aiming at the problems existing in the construction of high directional drilling in Tingnan Coal Mine roof, such as stratum breakage in open hole section, mudstone shrinkage in directional hole section, low efficiency of two-stage reaming and easy ...
Changbao JING +4 more
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Petroleum Exploration and Development, 2013 In order to address the contradiction between drilling safety and coalbed damage control, a degradable drilling-in fluid (DIF) was developed for complex structure wells in coalbed methane (CBM) reservoirs.
Dawei LIU +5 more
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Research on Gas Extraction Technology of Directional Long Borehole in Ultrathick Coal Seam
Geofluids, 2022 Gas extraction is an important way to control gas disasters. The effect of traditional gas extraction drilling on ultrathick coal seam is not well. In order to improve the rate of gas extraction, directional long drilling is used to replace conventional ...
Yaobin Li, Tao Jiang, Xin Guo
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Meikuang Anquan, 2022 Stick-slip vibration generally exists in the process of drilling and construction, and near-horizontal directional drilling in underground coal mines is no exception.
WANG Siyi
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Drag Reduction Technology of Ultra-long Directional Drilling and Its Application
Meikuang Anquan, 2020 In view of the problems such as high resistance, low efficiency and limited drilling depth during the sliding directional drilling under the condition of deep hole, this paper studies and forms the drag reduction technology of sliding drilling, including
WANG Xian, JIANG Lei, LI Quanxin, XU Chao
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Action recognition method for mine kilometer directional drilling rig
Gong-kuang zidonghua, 2022 At present, the walking and drilling operations of the mine kilometer directional drilling rig are all realized by the manual operation of drillers. The intelligence level is low.
XIANG Xueyi +5 more
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Meikuang Anquan, 2023 The geological structure of the deep coal seam in Qinshui Basin is relatively complex, which poses a new challenge to the control of the directional landing site of the horizontal well and the control of the drilling trajectory of the horizontal section,
WANG Yuhong, SUN Tianyu, LI Peng
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Research on trajectory control of dual-power composite directional drilling in underground coal mine
Gong-kuang zidonghua, 2021 Drilling trajectory control is one of the key technologies to achieve safe and efficient composite directional drilling. Due to the different force conditions of drilling tools in the hole and the composition of the analysis model, the existing ...
LI Quanxin +3 more
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Magnetic Interference Correction Method for Dynamic Measurement of Steering Head and Its Application
Shiyou jixieDuring the operation of the rotary steering system， the magnetic interference faced by the steering head when performing dynamic measurement tasks mainly comes from two aspects： one is the magnetic influence of the internal current fluctuation of the M30
Zhu Jinsong +6 more
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